Measles Befalls 288 in Biggest Outbreak Since '94

The number of measles cases in the U.S. has hit a new high since the highly contagious disease was officially declared eliminated 14 years ago, in the latest sign of a troubling resurgence.

The 288 cases reported in 18 states as of May 23 is the highest number of cases in the first five months of the year since 1994, the Centers for Disease Control and Prevention said Thursday. Nearly all of the cases were linked to foreign travel by unvaccinated people, and many had been in the Philippines, where a large outbreak has...